Hi Barf. This is what IrScrutinizer generated:

0000 0073 0000 000A 0020 0020 0040 0040 0040 0040 0040 0020 0020 0020 0020 0020 0020 0040 0020 0020 0040 0020 0020 0CC8

I'm not sure I'm 100% clear on the logic. But for the "Standby" command detailed in my original post, does the generated code also include what is listed as the data code (001100 )?

I'd like to understand how Lyndel came up with the code with the data Audio Research provided.So for example, with Play = Key Number : 16 ; Key Name : Play ; Hex Code: 35 ; Decimal Code : 53 ; Data Code : 110101 {D5 D4 D3 D2 D1 D0}], I'd have to enter 20 for D still, but 0x35 for F? Ignore the Data Code?

I have to go to the customer's code and try it out now. Thanks very much for all of your and Lyndel's help!